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CAIE A-Level Biology A2 Formula Reference Hardy Weinberg Equations Questions

Apply p + q = 1 and p² + 2pq + q² = 1 to biological population data, distinguishing allele frequencies from genotype frequencies before predicting numbers.

Syllabus
2028–2030
Course
Biology 9700
Level
A2

Exam points

  • Derive allele frequencies from recessive phenotype data using q², q and p = 1 - q
  • Use p², 2pq and q² to predict genotype percentages or numbers in a population

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